Speed regulating switch and hair clipper

Abstract

The utility model relates to hairdressing apparatus technical field, especially a kind of speed regulation switch and hairdressing apparatus, including casing, lever, trigger switch, linkage switch and elastic piece, trigger switch includes power switch, acceleration switch and deceleration switch, lever one end is penetrated to casing and is connected with linkage piece, and it is configured as when lever is acted on by external force, linkage piece can be driven to generate the activity of first direction or second direction in casing, wherein when first direction activity, power switch can be triggered, to switch hairdressing apparatus;Second direction activity, acceleration switch or deceleration switch can be triggered, to carry out speed regulation to hairdressing apparatus;Elastic piece, elastic piece is loaded between linkage piece and casing, to be used for the reset after linkage piece activity, solved the problem that current speed regulation switch operation is relatively inconvenient.

Description

Technical Field

[0001] This utility model relates to the field of hair clipper technology, and in particular to a speed control switch and a hair clipper. Background Technology

[0002] Traditional hair clippers, such as electric clippers and shavers, typically have a power switch and a speed control switch, which are usually separate components. For example, a single button is used to turn the clippers on and off, and another separate dial or button is used to adjust the speed. This design has significant drawbacks: users need to operate different buttons separately, making the operation logic less intuitive and integrated, and the user experience needs improvement. Utility Model Content

[0003] In order to solve the above-mentioned technical problems, the purpose of this utility model is to provide a speed control switch and a hair clipper, which solves the problem that the operation of existing speed control switches is relatively inconvenient.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is: a speed control switch, including a housing;

[0005] lever;

[0006] Trigger switches include power switches, acceleration switches, and deceleration switches;

[0007] The linkage has one end of the lever extending into the housing and connected to the linkage. It is configured to drive the linkage to move in a first direction or a second direction within the housing when the lever is subjected to an external force. When the lever moves in the first direction, it can trigger the power switch to turn the hair clipper on and off.

[0008] When the device moves in the second direction, it can trigger an acceleration switch or a deceleration switch to adjust the speed of the hair clipper.

[0009] An elastic element is loaded between the linkage and the housing to reset the linkage after it has moved.

[0010] Furthermore, the first and second directions intersect perpendicularly.

[0011] By adopting the above technical solution, and by limiting the first direction and the second direction to perpendicular intersection, it is more in line with the operating habits of users operating the lever. When users press to turn on the device, they will not accidentally trigger the speed adjustment function; conversely, when they toggle to adjust the speed, they will not accidentally trigger the power-on function. This vertical design is most in line with the principles of ergonomics, and users can operate accurately by intuition without learning, which greatly reduces the possibility of misoperation and improves the accuracy of operation and the sense of security of use.

[0012] Furthermore, the first direction is the thickness direction of the casing, and the second direction is the height direction of the casing.

[0013] By adopting the above technical solution, the switch is set along the thickness direction, which makes it easy for people to directly press the lever to trigger the power to turn on the hair clipper. The second direction is set along the height direction, which makes it easy to adjust the operating level of the hair clipper. This claim makes the operation mode of the switch structure fully conform to the most natural and comfortable intuitive operation habits of users, and the human-computer interaction experience is excellent.

[0014] Furthermore, a limiting guide structure is provided between the linkage and the housing to limit the movement path of the linkage in the first and second directions.

[0015] By adopting the above technical solution and setting a limit guide structure, precise mechanical constraints and guidance are provided for the compound motion of the linkage components. This not only ensures that the linkage components can move strictly along the preset first and second directions, thereby accurately and reliably triggering the corresponding switch contacts and avoiding trigger failure or false triggering caused by drift of the movement trajectory, but also makes the entire operation process have clear tactile feedback. Users can clearly perceive whether the operation is in place through tactile feedback, which enhances the certainty of operation and the quality of the product.

[0016] Furthermore, the guide and limiting structure includes a rotating shaft on both sides of the linkage and a guide groove on the housing along the first direction. The rotating shaft is movably disposed in the guide groove so that the linkage can swing in the second direction and move in the first direction with the rotating shaft as the axis of rotation.

[0017] By adopting the above technical solution, the cooperation between the rotating shaft and the guide groove cleverly decomposes the complex compound motion of the linkage into two simple basic motions: linear movement along the guide groove (corresponding to the first direction) and rotational oscillation around the rotating shaft (corresponding to the second direction). This design has a simple structure, few parts, but very reliable function, and is very convenient to process and assemble. It is beneficial to control production costs and ensure product consistency. The guide groove physically restricts the motion trajectory and ensures the accuracy of operation. In this way, by simply using the movement and oscillation of the rotating shaft in the guide groove, the running trajectory of the linkage is limited without too many complex structures. The structural design is simple and ingenious.

[0018] Furthermore, the elastic element is a torsion spring, which includes a torsion coil and a torsion arm extending along the torsion coil. The torsion coil is fitted onto the rotating shaft, and the torsion arm abuts against the housing.

[0019] By adopting the above technical solution, using a torsion spring as the elastic element and cleverly fitting it onto the rotating shaft, the structural space of the rotating shaft is fully utilized, achieving a high degree of structural integration and optimized space utilization. At the same time, the characteristics of the torsion spring enable it to provide just the right reset force for the two movements of the linkage (linear movement reset and swing reset). One part solves the reset requirements in two directions, eliminating the complex layout of multiple springs, further simplifying the structure, reducing costs and assembly complexity, and improving the reliability of the mechanism.

[0020] Furthermore, the power switch, acceleration switch, and deceleration switch are arranged linearly along the second direction, and the bottom of the linkage is provided with pressing protrusions corresponding to the power switch, acceleration switch, and deceleration switch.

[0021] By adopting the above technical solution, the three contacts are arranged linearly and correspond to the pressing protrusions at the bottom of the linkage, which facilitates the activation of the corresponding contact switch through the pressing protrusions at the bottom of the linkage when the lever is moved, thus ensuring the accuracy of triggering and the speed of response.

[0022] Furthermore, the housing has a through hole corresponding to the through position of the lever, and the surface of the housing has a protective cover to cover the through hole. The upper end of the lever passes through the through hole and the protective cover and extends out of the surface of the protective cover.

[0023] By adopting the above technical solution, the protective cover structure forms a double-insurance sealing protection. The protective cover covers the through hole of the lever, and even when the lever is in the active state, it can continuously and effectively block the gap of the hole, preventing dust, hair, water stains and other contaminants from entering the casing. This fundamentally solves the risk of internal circuit failure caused by the intrusion of external contaminants, and greatly improves the product's adaptability in complex usage environments and its long-term reliability.

[0024] Furthermore, the protective cover is made of flexible material, with its lower end covering the through hole and its upper end surrounding the outside of the lever.

[0025] By adopting the above technical solution, a protective cover is made of flexible material (such as silicone), which can effectively cover the hole without restricting the necessary movement of the lever. The lower end covers the through hole and the upper end surrounds the lever, forming a dynamic and complete sealing ring. It can maintain a tight seal whether the lever is stationary or in motion. The flexible material also provides a soft touch, enhancing the overall quality of the user experience.

[0026] A hair clipper, including the speed control switch described above.

[0027] By adopting the above technical solution, the switch structure brings multiple advantages such as simplified structure, enhanced sealing, optimized operation, and improved reliability. Therefore, hair clipper products using this switch structure also receive the full support of these beneficial effects, ultimately resulting in a high-quality hair clipper product with a simple appearance, smooth operation, strong durability, and excellent user experience, which significantly enhances its competitiveness and product value in the market.

[0028] Compared with the prior art, the advantages of this utility model are:

[0029] This utility model provides a speed control switch, which drives a linkage component to move in different directions through a lever, so as to control the start / stop and speed adjustment functions of the hair clipper respectively. For users, the operation logic is clear and intuitive, the user experience is significantly improved, and it is convenient for users to operate.

[0030] In this invention, by integrating the hair clipper's switch and speed control onto a single lever, the housing only needs one hole for the lever to pass through, fundamentally reducing the channels for dust and water ingress, significantly improving the product's sealing and dustproof / waterproof rating, and enhancing its reliability and durability. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of the hair clipper of this utility model.

[0032] Figure 2 This is a schematic diagram of the speed control switch of this utility model.

[0033] Figure 3 This utility model Figure 2 Enlarged view of the structure at point A in the middle.

[0034] Figure 4 This is an exploded view of a portion of the speed control switch of this utility model.

[0035] Figure 5 This utility model Figure 4 Enlarged view of the structure at point B in the middle.

[0036] Figure 6 This is a cross-sectional view of the structure of the hair clipper of this utility model.

[0037] Figure 7 This utility model Figure 6 Enlarged view of the structure at point C (initial state of the switch structure).

[0038] Figure 8 This utility model Figure 7 Side section view of the middle structure.

[0039] Figure 9 This utility model Figure 6Schematic diagram of the structure at point C (acceleration state of the switch structure).

[0040] In the picture:

[0041] 1. Housing, 11. Bottom shell, 12. Front shell, 121. Through hole, 122. First bayonet, 123. Second bayonet, 124. Limiting edge, 125. Guide groove.

[0042] 2. Protective cover;

[0043] 3 levers, 31 clip connectors, 32 lever handles.

[0044] 4 linkage components, 41 rotating shaft, 42 retaining edge, 43 pressing protrusion, 431 acceleration point, 432 switching point, 433 deceleration point, 44 locking hole.

[0045] 5. Torsion spring, 51. First torsion arm, 52. Torsion ring, 53. Second torsion arm.

[0046] 6 Circuit board, 61 Acceleration switch, 62 Power switch, 63 Deceleration switch. Detailed Implementation

[0047] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0048] Reference Figure 1 and 2 A speed control switch includes a hair clipper housing 1, a lever 3, a trigger switch, a linkage 4, and an elastic element. The trigger switch is located on a circuit board 6 inside the housing 1 and includes a linearly arranged power switch 62, an acceleration switch 61, and a deceleration switch 63. The linkage 4 is movably disposed inside the housing 1 and is located above the power switch 62, acceleration switch 61, and deceleration switch 63. One end of the lever 3 passes through the housing 1 and connects to the linkage 4. When the lever 3 is subjected to external force, it can drive the linkage 4 to move in a first direction or a second direction within the housing 1. When moving in the first direction, it can trigger the power switch 62 to start and stop the hair clipper. When moving in the second direction, it can trigger the acceleration switch 61 or the deceleration switch 63 to adjust the speed of the hair clipper. The elastic element is loaded between the linkage 4 and the housing 1 for resetting the linkage 4 after movement.

[0049] In this embodiment, a lever 3 drives a linkage 4 to move in different directions to control the start / stop and speed adjustment functions of the hair clipper. The operation logic is clear and intuitive for the user, and the user experience is significantly improved. By integrating the hair clipper's switch and speed adjustment into a lever 3, the housing 1 only needs to have one hole for the lever 3 to pass through, which fundamentally reduces the channels for dust and water to enter, significantly improves the product's sealing and dustproof and waterproof rating, and enhances its reliability and durability.

[0050] In this embodiment, the trigger switches include a power switch 62, an acceleration switch 61, and a deceleration switch 63. Triggering the corresponding power switch 62 enables the hair clipper to start or stop. Triggering the acceleration switch 61 or deceleration switch 63 enables the hair clipper to accelerate or decelerate. It is conceivable that the power switch 62, acceleration switch 61, and deceleration switch 63 are not limited to this function. They can also be switches for other functions. For example, the power switch 62 can be turned into a confirmation button, and the acceleration switch 61 and deceleration switch 63 can be turned into mode switching buttons, thereby enabling the hair clipper to switch between multiple modes such as "power saving mode" and "boost mode". Of course, the trigger switches can also be switches for other functional modes, which will not be elaborated here. Based on the content of this embodiment, any simple replacement of the button functions is within the protection scope of this embodiment.

[0051] In this embodiment, the hair clipper can be a razor, electric clippers, or other products requiring speed adjustment. Taking electric clippers as an example, its shape can be a cuboid, cube, cylinder, disc, ellipse, or other shapes. In this embodiment, the electric clippers are taken as a cuboid, which has dimensions in three directions: length, width, and height. Correspondingly, refer to... Figure 1 The coordinate system is marked with three coordinate systems: X, Y, and Z. The X-axis corresponds to the width direction (which is also the thickness direction of the hair clipper), the Y-axis corresponds to the height direction, and the Z-axis corresponds to the length direction of the razor.

[0052] It should be noted that because electric hair clippers need to be held by the user, the actual product has a corresponding curved surface. Other shapes such as cuboids, cubes, cylinders, discs, and ellipses referred to in this article are only close to the shape in terms of overall appearance. For example, a cuboid is not limited to a square prism shape with regular edges and corners. A cuboid shaver is actually a structure that is close to a cuboid with a curved surface.

[0053] In this embodiment, the first and second directions of the lever 3 are preferably designed to be perpendicularly intersecting. This better suits the shape of the rectangular shaver housing 1 and the operating habits of the user. When the user presses the lever to turn the shaver on or off, the speed adjustment function will not be accidentally triggered. Conversely, when the user adjusts the speed, the power-on function will not be accidentally triggered. This vertical design is most in line with ergonomic principles, allowing users to operate accurately based on intuition without learning, greatly reducing the possibility of misoperation and improving operational accuracy and user safety.

[0054] Specifically, the first direction can be the X-axis and the second direction can be the Y-axis; or the first direction can be the X-axis and the second direction can be the Z-axis. In this embodiment, it is preferred that the first direction be the X-axis and the second direction be the Y-axis. In this way, when the user holds the housing 1, his thumb can press the lever 3 to drive the linkage 4 to move up and down along the X-axis and trigger the power switch 62, realizing the on / off function of the shaver. Moving the lever 3 up and down along the Y-axis can drive the linkage 4 to press the deceleration switch 63 or the acceleration switch 61, realizing the speed adjustment function of the shaver. This operation method is in line with the most natural and comfortable intuitive operation habits of users, and the human-computer interaction experience is excellent.

[0055] In this embodiment, refer to Figure 1 A through hole 121 is provided on the surface of the housing 1. The lower end of the lever 3 moves through the through hole 121 and is connected to the linkage 4. The upper end of the lever 3 extends out of the surface of the housing 1 to form a handle 32. The user can move the linkage 4 at the lower end of the lever 3 along the first direction or the second direction by moving the handle 32.

[0056] As for the specific connection method between the linkage 4 and the lever 3, the two can be integrally formed, or they can be detachably connected. Preferably, they are connected in a detachable manner, such as snap-fit ​​or screw-fit. Taking snap-fit ​​as an example, refer to... Figure 3 and 4 The connecting end of the lever 3 and the linkage 4 forms a snap-fit ​​connector 31, and the corresponding linkage 4 has a snap-fit ​​hole 44 inside that engages with the snap-fit ​​connector 31. When the two are combined, the lever 3 is inserted into the snap-fit ​​hole 44 through the snap-fit ​​connector 31, thereby achieving a detachable connection between the two.

[0057] Based on the above embodiments, as a specific embodiment of the linkage 4 being displaced along the first and second directions of the housing 1 under the drive of the lever 3, the two are movably connected by a limiting guide structure. The limiting guide structure provides precise mechanical constraints and guidance for the compound motion of the linkage 4. This not only ensures that the linkage 4 can move strictly along the preset first and second directions, thereby accurately and reliably triggering the corresponding switch contacts and avoiding trigger failure or false triggering caused by drift of the movement trajectory, but also makes the entire operation process have clear tactile feedback. Users can clearly perceive whether the operation is in place through tactile feedback, enhancing the certainty of operation and the quality of the product.

[0058] As a specific embodiment of the guide and limiting structure, refer to Figure 4-7It includes a rotating shaft 41 on both sides of the linkage 4 and a guide groove 125 on the inner wall of the housing 1 and arranged along the first direction. The axial direction of the two rotating shafts 41 is arranged along the Z-axis direction of the housing 1. The rotating shafts 41 are movably arranged in the guide groove 125 so that they can swing about the rotating shaft 41 as the axis of rotation in the second direction (second direction: Y-axis direction, that is, the height direction of the hair clipper), thereby triggering the acceleration switch 61 or the deceleration switch 63. When the lever 3 is pressed to drive the linkage 4 to move along the first direction (first direction: X-axis direction, that is, the thickness direction of the housing 1), the linkage 4 triggers the power switch 62 to realize the switching function of the shaver.

[0059] In this embodiment, refer to Figure 8 and 9 To facilitate the linkage 4 to touch the corresponding trigger switch under the drive of the lever 3, pressing protrusions 43 are respectively provided at the positions of the linkage 4 corresponding to the power switch 62, the acceleration switch 61 and the deceleration switch 63. The pressing protrusions 43 include acceleration points 431, switching points 432 and deceleration points 433 arranged linearly at intervals. The three correspond to the positions of acceleration switch 61, power switch 62 and deceleration switch 63 respectively. When the lever 3 is pressed to drive the linkage 4 to descend in the first direction, the linkage 4 triggers the power switch 62 through the switching point 432, thereby turning on the electric clipper. When the lever 3 is moved in the second direction, the lever 3 drives the linkage 4 to swing around the axis 41, thereby touching the acceleration switch 61 through the acceleration point 431 or triggering the deceleration switch 63 through the deceleration point 433, thereby realizing the speed adjustment function of the electric clipper.

[0060] In this embodiment, the trigger switch can be a micro switch, a tactile switch, a membrane switch, etc. As long as the corresponding switch can be triggered by the corresponding pressing protrusion 43 after the linkage 4 is activated, other types of switches can also be used, which will not be elaborated here.

[0061] In this embodiment, refer to Figure 4 and 7 In order to ensure that when the lever 3 is pressed to drive the linkage 4 down along the guide groove 125 to switch the electric clipper, the switching point 432 can effectively trigger the power switch 62, and the acceleration point 431 will not touch the acceleration switch 61 and the deceleration point 433 will not touch the deceleration switch 63, the distance between the switching point 432 and the power switch 62 is set to be smaller than the distance between the acceleration point 431 and the acceleration switch 61 and the distance between the deceleration point 433 and the deceleration switch 63. This ensures that when the lever 3 is pressed, only the switching function of the electric clipper will be triggered and the speed adjustment function will not be triggered, thus avoiding misoperation.

[0062] As one embodiment of the elastic element, refer to Figure 4 and 5Its elastic element is a torsion spring 5, which includes a torsion ring 52 and a first torsion arm 51 and a second torsion arm 53 extending from the torsion ring 52. The torsion spring 5 is sleeved on the rotating shafts 41 on both sides of the linkage 4 through the torsion ring 52. The linkage 4 has a retaining edge 42 on the side near the lever 3, and the first torsion arm 51 and the second torsion arm 53 are installed on the inner wall of the housing 1. Specifically, the housing 1 has a first latch 122 and a second latch 123 on both sides of the through hole 121 along the second direction. Both the first bayonet 122 and the second bayonet 123 have limiting edges 125 on their outer sides. Torsional arm grooves are formed between the limiting edges 125 and the first bayonet 122, and between the limiting edges 125 and the second bayonet 123. The ends of the corresponding first torsional arms 51 and second torsional arms 53 are respectively located in the torsional arm grooves on both sides of the through hole 121. Their retaining edges 42 abut against the first torsional arms 51 and the second torsional arms 52 respectively. The guide groove 125 is located between the two torsional arm grooves. Under normal conditions, refer to... Figure 8 When the axes of the two rotating shafts 41 of the linkage 4 are at position 41A, the switching point 432 of the linkage 4 is separated from the power switch 62. The specific operating principle of the electric clipper is as follows:

[0063] When the electric hair clipper is switched on: (refer to) Figure 8 In the initial state, when the lever 3 is pressed to lower the linkage 4, the linkage 4 descends to position 41B along the guide groove 125 via the rotating shaft 41. At this time, the power switch 62 is triggered to turn on the electric clipper. After the external force of pressing the lever 3 is removed, the torsion spring 5 elastically resets, driving the linkage 4 to reset to position 41A. This process is repeated to realize the switching function of the electric clipper.

[0064] Reference Figure 9 When the speed of the electric clipper is adjusted: when the lever 3 is moved to make the linkage 4 swing around the rotation axis 41, the corresponding acceleration switch 61 or deceleration switch 63 is triggered. During this process, the linkage 4 needs to overcome the elastic force of the torsion spring 5 so that the torsion spring 5 stores elastic potential energy. When the external force is removed, the torsion spring 5 resets to drive the linkage 4 back to the initial state. This process is repeated to realize the acceleration and deceleration functions of the electric clipper.

[0065] In this embodiment, a torsion spring 5 is used as an elastic element and cleverly fitted onto the rotating shaft 41, making full use of the structural space of the rotating shaft 41, achieving a high degree of structural integration and optimized space utilization; at the same time, the characteristics of the torsion spring 5 enable it to provide just the right reset force for the two movements (linear movement reset and swing reset) of the linkage 4 simultaneously. One part solves the reset requirements in two directions, eliminating the complex layout of multiple springs, further simplifying the structure, reducing cost and assembly complexity, and improving the reliability of the mechanism.

[0066] Based on the above embodiments, the function of the elastic element is to reset the linkage 4 after it moves along the first or second direction. Therefore, as long as this function can be achieved, the elastic element can also be other structures. For example, springs can be set in the first and second directions of the linkage 4 respectively, and the different elastic extension and contraction directions of the springs can be used to achieve the elastic reset of the linkage 4 after displacement in the first and second directions. Of course, the elastic element can also be other components or mechanisms, which will not be elaborated here. In the case of realizing the switching and speed adjustment of the electric push component through the lever 3 and the linkage 4, the technical solution of using other elastic elements for the reset after the lever 3 is displaced is within the protection scope of the elastic element in this embodiment.

[0067] Based on the above embodiments, referring to Figure 2 and 3 To prevent dust, hair, and other foreign objects from entering the housing 1 through the through hole 121, a protective cover 2 is provided on the outside of the through hole 121 to reduce the chance of foreign objects entering the housing 1.

[0068] Specifically, as one embodiment of the protective cover 2, it can be made of flexible material, such as silicone, rubber, or nylon. It can be flexible and elastic, or flexible but not elastic, such as nylon or plastic material. In this embodiment, an elastic flexible material is used as an example. The bottom edge of the protective cover 2 wraps around the outer periphery of the through hole 121, and its upper end wraps around the middle outer side of the lever 3, thereby achieving the shielding and protection of the through hole 121.

[0069] As another embodiment of the protective cover 2, its material can also be rigid. Its upper end is wrapped around the middle of the lever 3, and its lower end is slidably disposed on the part of the housing 1 located outside the through hole 121. As long as the unfolded area of ​​the protective cover 2 can cover the through hole 121, and the protective surface of the protective cover 2 always covers the through hole 121 when the lever 3 is turned, it can also play a protective role in preventing foreign objects from entering the housing 1.

[0070] Based on the above embodiments, as long as foreign objects can be reduced from entering the housing 1, the protective cover 2 can also have other shapes or structures, which will not be elaborated here.

[0071] Based on the above embodiments, the housing 1 includes a bottom shell 11 and a top shell 12, with a cavity formed between them. The aforementioned through hole 121 and torsion arm groove are correspondingly formed on the top shell 12. The electric hair clipper also includes components such as a fixed blade, a moving blade, a battery, a circuit board 6, a motor, and a transmission mechanism. Since these are not the main inventive points of this application, they are only briefly described. The fixed blade is fixedly mounted on one end of the bottom shell 11. The motor drives the moving blade to reciprocate on one side of the fixed blade through the transmission mechanism to realize the hair trimming function of the blade head.

[0072] Although the preferred embodiments of the present invention have been described in detail above, it should be clearly understood that various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A speed control switch, characterized in that, include: chassis; lever; A trigger switch, which includes a power switch, an acceleration switch, and a deceleration switch; The linkage component has one end of the lever extending into the housing and connected to the linkage component. It is configured such that when the lever is subjected to an external force, it can drive the linkage component to move in a first direction or a second direction within the housing. When the lever moves in the first direction, it can trigger a power switch to turn the hair clipper on or off. When the device moves in the second direction, it can trigger the acceleration switch or deceleration switch to adjust the speed of the hair clipper. An elastic element is loaded between the linkage and the housing to reset the linkage after it has moved.

2. A speed control switch according to claim 1, characterized in that, The first direction and the second direction intersect perpendicularly.

3. A speed control switch according to claim 1 or 2, characterized in that, The first direction is the thickness direction of the casing, and the second direction is the height direction of the casing.

4. A speed control switch according to claim 3, characterized in that, A limiting guide structure is provided between the linkage component and the housing to limit the movement path of the linkage component to the first direction and the second direction.

5. A speed control switch according to claim 4, characterized in that, The guide limiting structure includes a rotating shaft on both sides of the linkage and a guide groove on the housing along the first direction. The rotating shaft is movably disposed in the guide groove so that the linkage can swing in the second direction and move in the first direction with the rotating shaft as the axis of rotation.

6. A speed control switch according to claim 5, characterized in that, The elastic element is a torsion spring, which includes a torsion coil and a torsion arm extending along the torsion coil. The torsion coil is correspondingly sleeved on the rotating shaft, and the torsion arm correspondingly abuts against the housing.

7. A speed control switch according to claim 1, characterized in that, The power switch, acceleration switch, and deceleration switch are arranged linearly along the second direction, and the bottom of the linkage is provided with pressing protrusions corresponding to the power switch, acceleration switch, and deceleration switch.

8. A speed control switch according to claim 1, characterized in that, The housing has a through hole corresponding to the through position of the lever, and the surface of the housing has a protective cover to cover the through hole. The upper end of the lever passes through the through hole and the protective cover and extends out of the surface of the protective cover.

9. A speed control switch according to claim 8, characterized in that, The protective cover is made of flexible material, with its lower end covering the through hole and its upper end surrounding the outside of the lever.

10. A hair clipper, characterized in that, Includes the speed control switch as described in any one of claims 1-9, excluding 3.

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